/*
 * Copyright (c) 2010, okazoh_tk. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  - Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  - Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

//#include "alkes/gfx/IGraphics.h"
#include "alkes/win32app/Win32Window.h"

namespace alkes {

const char* Win32Window::class_name_ = "alkes::ApplicationWindow";
bool Win32Window::registered_ = false;

Win32Window::Win32Window()
: hwnd_(NULL)
, user_(0)
{
}

Win32Window::~Win32Window()
{
    destroyWindow();
}

bool Win32Window::initialize(uint16_t width, uint16_t height, const char* title)
{
    return createWindow(width, height, title);
}

void Win32Window::finalize()
{
    destroyWindow();
}

void Win32Window::show(int state)
{
    ShowWindow(hwnd_, state);
}

HINSTANCE Win32Window::registerClass()
{
    if (!registered_)
    {
        WNDCLASSEX wcex;

        wcex.cbSize = sizeof(WNDCLASSEX);

        wcex.style          = CS_HREDRAW | CS_VREDRAW;
        wcex.lpfnWndProc    = DefWindowProc;
        wcex.cbClsExtra     = 0;
        wcex.cbWndExtra     = 0;
        wcex.hInstance      = GetModuleHandle(NULL);
        wcex.hIcon          = NULL;
        wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);
        wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
        wcex.lpszMenuName   = NULL;
        wcex.lpszClassName  = class_name_;
        wcex.hIconSm        = NULL;

        if (RegisterClassEx(&wcex))
            registered_ = true;
    }

    return registered_ ? GetModuleHandle(NULL) : NULL;
}

bool Win32Window::createWindow(uint16_t width, uint16_t height, const char* title)
{
    if (!hwnd_)
    {
        HINSTANCE instance = registerClass();

        if (NULL == instance)
            return false;

        hwnd_ = CreateWindowExA(
                0/*WS_EX_LAYERED*/,
                class_name_,
                title ? title : "alkes application",
                WS_OVERLAPPEDWINDOW & (~WS_THICKFRAME),
                CW_USEDEFAULT,
                CW_USEDEFAULT,
                width,
                height,
                NULL,
                NULL,
                instance,
                NULL);
    }

    return hwnd_ != NULL;
}

void Win32Window::setUser(IGraphics* graphics)
{
    user_ = graphics;
}

void Win32Window::destroyWindow()
{
    if (!hwnd_)
    {
        user_ = 0;
        DestroyWindow(hwnd_);
        hwnd_ = NULL;
    }
}

}
